The Exeter River is a 40.5 miles (65.2 km)-long river located in Rockingham County

Rockingham County, New Hampshire

-Demographics:As of the census of 2000, there were 277,359 people, 104,529 households, and 74,320 families residing in the county. The population density was 399 people per square mile . There were 113,023 housing units at an average density of 163 per square mile...

 in southeastern New Hampshire

New Hampshire

New Hampshire is a state in the New England region of the northeastern United States of America. The state was named after the southern English county of Hampshire. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Atlantic Ocean to the east, and the Canadian...

, the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

.

It rises in the town of Chester

Chester, New Hampshire

Chester is a town in Rockingham County, New Hampshire, United States. The population was 4,768 at the 2010 census. It is home to Chester College .-History:Incorporated in 1722, Chester once included Candia, set off in 1763...

, 12 miles (19.3 km) southeast of Manchester

Manchester, New Hampshire

Manchester is the largest city in the U.S. state of New Hampshire, the tenth largest city in New England, and the largest city in northern New England, an area comprising the states of Maine, New Hampshire, and Vermont. It is in Hillsborough County along the banks of the Merrimack River, which...

. It follows a winding course east and northeast to Exeter

Exeter, New Hampshire

Exeter is a town in Rockingham County, New Hampshire, United States. The town's population was 14,306 at the 2010 census. Exeter was the county seat until 1997, when county offices were moved to neighboring Brentwood...

, where it becomes the Squamscott River

Squamscott River

The Squamscott River is a tidal river in Rockingham County, southeastern New Hampshire, in the United States. It rises at Exeter, fed by the Exeter River...

, a tidal river

Tidal river

A tidal river is a river, or more typically a stretch of a river, whose flow and level is influenced by tides. An example of a tidal river is the portion of the Connecticut River flowing from Windsor Locks, Connecticut, to the Atlantic Ocean. The Brisbane River, which flows into the Pacific Ocean...

 leading north to Great Bay

Great Bay (New Hampshire)

Great Bay is a tidal estuary located in Strafford and Rockingham counties in eastern New Hampshire, United States. The bay occupies over , not including its several tidal river tributaries. Its outlet is at Hilton Point in Dover, New Hampshire, where waters from the bay flow into the Piscataqua...

. There are falls and small dams at Exeter and several other villages along the river. Its drainage basin encompasses an area of 126 square miles (326.3 km²). The upper 33.3 miles (53.6 km) of the river, from its headwaters to its confluence with Great Brook in Exeter, were designated into the NH Rivers Management and Protection Program in August 1995.